consulate in benghazi, libya left four americans dead including ambassador chris stevens. libyan authorities reported that they have made some arrests. >> i saw those press reports before i came down. i was not able to confirm them, but obviously it would be a good thing if we're starting to move forward on the justice piece. >> reporter: the fbi open an investigation as officials try to sort out whether this was a protest that got out of hand or an organized terrorist attack. danielle nottingham, cbs news, the state department. >> three americans who were injured in the benghazi attack are being treated at a u.s. military hospital in germany. receipt a mans of ambassador stevens -- the remains of ambassador stevens and the three others killed will arrive back in this country tomorrow. >>> we are learning more about the attack itself. every room in that american consulate was torched, vandalized and looted. the compound on a residential street in the port city of benghazi was not heavily fortified. those attackers bombed the guard house and took over the main building and